fbinit.js

      <div id="fb-root"></div>
        <script>
          window.fbAsyncInit = function() {
            FB.init({
              apiKey : 'APIKEY',
              status : true, // check login status
              cookie : true, // enable cookies to allow the server to access the session
              xfbml  : true  // parse XFBML
            });
          };

          (function() {
            var e = document.createElement('script');
            e.type = 'text/javascript';
            e.src = 'http://static.ak.fbcdn.net/connect/en_US/core.js';
            e.async = true;
            document.getElementById('fb-root').appendChild(e);
          }());
        </script>